I would also like an explanation of the level 55 hero ability. Is this for spec ops? 

Also please explain the level 85 ability. Black site offensive missions? What is that? 

Cshock said:

What does the hero ability for "unit offense (alliance HQ off. Missions)" and "unit offense (blacksite off.missions)" do?

Hi! I'll try to explain on example. If you have reinforcements on a BS and you activate this Offense Bonus beсause you're planning to attack other BS, this Bonus will give you advantage when attacking that new BS, at first place, and, additionally, it will add a bit offense stats to Defensive Units on a BS that you hold. Same for Alliance HQ. 

I would also like an explanation of the level 55 hero ability. Is this for spec ops? 

Also please explain the level 85 ability. Black site offensive missions? What is that? 

Thank you for your time mods.

So the level 55 hero ability should be set to offense if I am attacking another alliances HQ and left on defense the rest of the time?

My understanding is that this scenario also applies to the level 85 Hero Ability. Leave on defense always unless I am attacking a Black Site. 

DamagePlan said:

So the level 55 hero ability should be set to offense if I am attacking another alliances HQ and left on defense the rest of the time?

My understanding is that this scenario also applies to the level 85 Hero Ability. Leave on defense always unless I am attacking a Black Site. 

Thank you for your time.

Hi! Not quite like that. These bonuses are active for both Offense and Defense Units, regardless of the action you perform (defend or attack). 

Is it possible that these two hero abilities at level 55 and 85 will only affect troops that are garrisoned at the HQ and at the BS? If this is true, shouldn't they always be left on defense?